Francium

Unknown
223
[Rn] 7s1
223Fr
1
7
s
87
2, 8, 18, 32, 18, 8, 1
392.96
Fr
Unknown
21°C, 70°F, 294 K
650°C, 1202°F, 923 K
Marguerite Perey
1939
7440-73-5
4886484
More Information
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Atomic Data

Atomic Radiues, Non-bonded (A): 3.48
Electron Affinity (kJ mol-1): 44.38
Covalent Radiues (A): 2.42
Electronegativity (Pauling Scale): 0.7
Ionisation Energies (kJ mol-1) 1st 2nd 3rd 4th 5th 6th 7th 8th
392.96 - - - - - - -

Oxidation States and Isotopes

Common oxidation states 1
Isotope Atomic Mass Natural Abundance Half Life Mode of Decay
223Fr 223.020 - 22.0 m β-
α

Pressure and Temperature Data

Specific Heat Capacity: Unknown
Shear Modulus: Unknown
Young Modulus: Unknown
Bulk Modulus: Unknown
Pressure 400k Pressure 600k Pressure 800k Pressure 1000k Pressure 1200k Pressure 1400k Pressure 1600k Pressure 1800k Pressure 2000k Pressure 2200k Pressure 2400k
- - - - - - - - - - Unknown